Tonight, May 22, an explosion (or, potentially, a series of explosions) occurred at an Ariana Grande concert at Manchester Arena in Manchester, UK. Reportedly, attendees began fleeing the venue after hearing “two loud bangs.” At press time, the cause of the explosion has not been determined.

First responders remain on the scene as the situation continues to develop, but police have already reported “a number of confirmed fatalities.” The exact number of deaths has not yet been confirmed. Billboard reports that Ariana Grande’s representation have informed the outlet that she is “okay.”